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/*
* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch licenses this file to you under
* the Apache License, Version 2.0 (the "License"); you may
* not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.elasticsearch.cluster.routing.allocation;
import org.elasticsearch.Version;
import org.elasticsearch.cluster.ClusterState;
import org.elasticsearch.cluster.metadata.IndexMetaData;
import org.elasticsearch.cluster.metadata.MetaData;
import org.elasticsearch.cluster.node.DiscoveryNodes;
import org.elasticsearch.cluster.routing.IndexShardRoutingTable;
import org.elasticsearch.cluster.routing.RoutingNodes;
import org.elasticsearch.cluster.routing.RoutingTable;
import org.elasticsearch.common.logging.ESLogger;
import org.elasticsearch.common.logging.Loggers;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.cluster.ESAllocationTestCase;
import static org.elasticsearch.cluster.routing.ShardRoutingState.INITIALIZING;
import static org.elasticsearch.cluster.routing.ShardRoutingState.STARTED;
import static org.hamcrest.Matchers.equalTo;
/**
*
*/
public class ElectReplicaAsPrimaryDuringRelocationTests extends ESAllocationTestCase {
private final ESLogger logger = Loggers.getLogger(ElectReplicaAsPrimaryDuringRelocationTests.class);
public void testElectReplicaAsPrimaryDuringRelocation() {
AllocationService strategy = createAllocationService(Settings.builder().put("cluster.routing.allocation.node_concurrent_recoveries", 10).build());
logger.info("Building initial routing table");
MetaData metaData = MetaData.builder()
.put(IndexMetaData.builder("test").settings(settings(Version.CURRENT)).numberOfShards(2).numberOfReplicas(1))
.build();
RoutingTable routingTable = RoutingTable.builder()
.addAsNew(metaData.index("test"))
.build();
ClusterState clusterState = ClusterState.builder(org.elasticsearch.cluster.ClusterName.CLUSTER_NAME_SETTING.getDefault(Settings.EMPTY)).metaData(metaData).routingTable(routingTable).build();
logger.info("Adding two nodes and performing rerouting");
clusterState = ClusterState.builder(clusterState).nodes(DiscoveryNodes.builder().add(newNode("node1")).add(newNode("node2"))).build();
RoutingTable prevRoutingTable = routingTable;
routingTable = strategy.reroute(clusterState, "reroute").routingTable();
clusterState = ClusterState.builder(clusterState).routingTable(routingTable).build();
logger.info("Start the primary shards");
RoutingNodes routingNodes = clusterState.getRoutingNodes();
prevRoutingTable = routingTable;
routingTable = strategy.applyStartedShards(clusterState, routingNodes.shardsWithState(INITIALIZING)).routingTable();
clusterState = ClusterState.builder(clusterState).routingTable(routingTable).build();
logger.info("Start the replica shards");
routingNodes = clusterState.getRoutingNodes();
prevRoutingTable = routingTable;
routingTable = strategy.applyStartedShards(clusterState, routingNodes.shardsWithState(INITIALIZING)).routingTable();
clusterState = ClusterState.builder(clusterState).routingTable(routingTable).build();
routingNodes = clusterState.getRoutingNodes();
assertThat(prevRoutingTable != routingTable, equalTo(true));
assertThat(routingTable.index("test").shards().size(), equalTo(2));
assertThat(routingNodes.node("node1").numberOfShardsWithState(STARTED), equalTo(2));
assertThat(routingNodes.node("node2").numberOfShardsWithState(STARTED), equalTo(2));
logger.info("Start another node and perform rerouting");
clusterState = ClusterState.builder(clusterState).nodes(DiscoveryNodes.builder(clusterState.nodes()).add(newNode("node3"))).build();
prevRoutingTable = routingTable;
routingTable = strategy.reroute(clusterState, "reroute").routingTable();
clusterState = ClusterState.builder(clusterState).routingTable(routingTable).build();
logger.info("find the replica shard that gets relocated");
IndexShardRoutingTable indexShardRoutingTable = null;
if (routingTable.index("test").shard(0).replicaShards().get(0).relocating()) {
indexShardRoutingTable = routingTable.index("test").shard(0);
} else if (routingTable.index("test").shard(1).replicaShards().get(0).relocating()) {
indexShardRoutingTable = routingTable.index("test").shard(1);
}
// we might have primary relocating, and the test is only for replicas, so only test in the case of replica allocation
if (indexShardRoutingTable != null) {
logger.info("kill the node [{}] of the primary shard for the relocating replica", indexShardRoutingTable.primaryShard().currentNodeId());
clusterState = ClusterState.builder(clusterState).nodes(DiscoveryNodes.builder(clusterState.nodes()).remove(indexShardRoutingTable.primaryShard().currentNodeId())).build();
prevRoutingTable = routingTable;
routingTable = strategy.deassociateDeadNodes(clusterState, true, "reroute").routingTable();
clusterState = ClusterState.builder(clusterState).routingTable(routingTable).build();
logger.info("make sure all the primary shards are active");
assertThat(routingTable.index("test").shard(0).primaryShard().active(), equalTo(true));
assertThat(routingTable.index("test").shard(1).primaryShard().active(), equalTo(true));
}
}
}
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